One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,9)(4,8)(5,7)(6,11)(10,16)(12,14)(13,15)(17,18)(19,29)(20,35)(21,28)(22,27)(23,26)(24,33)(25,37)(30,42)(31,32)(34,41)(36,45)(38,44)(39,43)(40,48)(46,47) involution — undirected(1,3,5,11)(2,6,7,9)(4,12,13,10)(8,16,15,14)(17,19,22,33)(18,24,27,29)(20,36,38,48)(21,31,23,34)(25,42,43,46)(26,32,28,41)(30,37,47,39)(35,40,44,45)(17,20)(18,25)(19,30)(21,37)(22,38)(23,39)(24,40)(26,35)(27,43)(28,44)(29,45)(31,36)(32,46)(33,47)(34,48)(41,42) involution — undirected(2,7)(6,9)(8,15)(14,16)(17,21,22,23)(18,26,27,28)(19,31,33,34)(20,37,38,39)(24,32,29,41)(25,35,43,44)(30,36,47,48)(40,46,45,42)(1,4,5,13)(2,8,7,15)(3,10,11,12)(6,14,9,16)(17,18)(19,32)(20,25)(21,26)(22,27)(23,28)(24,34)(29,31)(30,46)(33,41)(35,37)(36,45)(38,43)(39,44)(40,48)(42,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.